package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.BaseException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     */
    @Override
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        String string = DigestUtils.md5DigestAsHex(password.getBytes());
        //密码比对
        // 进行md5加密，然后再进行比对
        if (!string.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    /**
     * 分页查询
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // 校验页码
        employeePageQueryDTO.check();
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> emps = (Page<Employee>) employeeMapper.pageQuery(employeePageQueryDTO);
        return new PageResult(emps.getTotal(), emps.getResult());
    }

    /**
     * 新增员工
     */
    @Override
    public void addEmp(EmployeeDTO employeeDTO) {
        Employee exits = employeeMapper.getByUsername(employeeDTO.getUsername());
        if (exits != null) {
            throw new BaseException("账户已存在");
        }
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setStatus(StatusConstant.DISABLE);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employeeMapper.add(employee);
    }


    /**
     * 启用禁用
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder().id(id).status(status).updateUser(BaseContext.getCurrentId()).build();
        employeeMapper.update(employee);
    }

    /**
     * 修改员工信息
     */
    @Override
    public void updateEmpInfo(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     */
    @Override
    public Employee queryById(Integer id) {
        return employeeMapper.queryById(id);
    }
}
